Fast clapping has no single viral origin, as applause is a universal sound used in theatres, sports arenas, and television for decades, and short recordings of it have long circulated on soundboards and in editing libraries. Online, creators reuse this kind of rapid applause because it is instantly recognisable without any words, works across languages, and signals approval in seconds. It remains popular in short-form video, streams, and reaction edits, where a quick burst of clapping can turn an ordinary moment into a celebration without needing music or dialogue.